6ppc ring around the neck?

[600-60x]

Picked up a stollie panda in 6 ppc 262 neck i tuun all my match rifle necks but to .13
For this rifle I have no choice but to turn to.8+
Way to thin in my opinion
next years barrel will be .269 neck
But I will say this barrel shoots
I’m about 10 reloads on the brass and I m getting a bright ring around the necks half way up also has some bullets get loose on a few loaded rounds ?
Nothing wrong with the die setup
I have seen this on the body which means time to toss them before they separate
Is this the same but on the necks?

 

[T Kop]

Pictures of ring, loose loaded bullet?
Tim

 

[600-60x]

The pictures look like the neck is only sized half way down but that’s not the I don’t have any pictures of the brass of loose bullet rnds

 

[600-60x]

View attachment 1689011View attachment 1689012The pictures look like the neck is only sized half way down but that’s not the I don’t have any pictures of the brass of loose bullet rnds

These pictures are after resizing again

 

[600-60x]

Most br shooters that turn to.8 go with.2-.3 neck tension I’m not a fan of that either
I have been using 3.5 to.4
Maybe that has something to do with it
Also newer brass with only 3-5 reloads
Does not have this problem

 

[D Coots]

Incorrect neck wall thickness or problem in chamber neck. .0081 works good with most bullets in a .262ND Use
256 bushing. Bullet should slip into fired round.

Just went through this same problem. Was in the chamber for me.

 

[Mulligan]

Can you provide some pictures of fire brass?

CW

 

[T Kop]

Is it a f/l bushing die.

 

[ShtrRdy]

I would guess it's the bushing resizing a stiffer brass.

 

[600-60x]

Is it a f/l bushing die.

Yes

 

[T Kop]

What does your nk measure after sizing and again with bullet seated.

 

[old_heli_logger]

Do you anneal your brass every time?

 

[JMayo]

The ring on the neck is just the bushing mark. All mine have that.
If bullets are too loose go down on bushing size
I don't go by measurements to choose bushing after the start of figuring it out, i go by the target. I load light neck tension. Bullets don't turn by hand through.

 

[R.Morehouse]

Are you using a BT bullet, and are you seating your bullet deeper than the bushing ring on the brass? My BT bullets like heavy neck tension and in the lands, running at the top node. I run a 262 trimmed to 8 and anneal every time.

Regards
Rick

 

[600-60x]

i have found out what the ring mark is
it’s not were the bushing stops bushing travels down to almost the neck shoulder point I know that because I can see the grease marks after sizing
It’s were the bottom of the flat based bullets stop i seat to touch
if I measure the sized neck above the ring .255
Below the ring .253 (see pictures)
So it’s just the top of the neck that is getting resized
So the reason for the ring is not a neck separation concern
I use a .256 bushing that gives me.255 o/d
Wall thickness.8
.255 minus .16
Gives me.239
.4 tension
So why are my bullets falling out (lol)
seem fine when I load them but I have had some heads come out just by taking the loaded round out of the box ?
68 grn fb bench marks
They are no longer in business
Bob white (shooters corner) had old stock I bought them to get started
They shoot well base measure.243+
Not that this should matter but I lube inside of the necks with neo2 always have this is a new problem
I anneal every time with an amp annealer

 

[Mulligan]

i have found out what the ring mark is
it’s not were the bushing stops bushing travels down to almost the neck shoulder point I know that because I can see the grease marks after sizing
It’s were the bottom of the flat based bullets stop i seat to touch
if I measure the sized neck above the ring .255
Below the ring .253 (see pictures)
So it’s just the top of the neck that is getting resized
So the reason for the ring is not a neck separation concern
I use a .256 bushing that gives me.255 o/d
Wall thickness.8
.255 minus .16
Gives me.239
.4 tension
So why are my bullets falling out (lol)
seem fine when I load them but I have had some heads come out just by taking the loaded round out of the box ?
68 grn fb bench marks
They are no longer in business
Bob white (shooters corner) had old stock I bought them to get started
They shoot well base measure.243+
Not that this should matter but I lube inside of the necks with neo2 always have this is a new problem
I anneal every time with an amp annealer


View attachment 1689132View attachment 1689133View attachment 1689134View attachment 1689135View attachment 1689136

I suspect you do not have enough clearance on a loaded round in the chamber.
Do you have the classic sine wave of carbon on the neck of a fired case or just the ring on a freshly fired case?

CW

 

[D Coots]

.8 neck wall thickness??????

Don't know about any other disciplines, but in Short Range BR, annealing is not needed.

It's just busy work.

I'll be back after golf to extinguish the Sacred Cow........

 

[CJ6]

Why isn't the bottom half of the neck being blown out to the same dimension as the top half upon firing?? I'm lost on that point. If it were the neck would be the same diameter full length and would size the same way.


Edit to add.... Are you using a separate expanding mandrel after initial sizing and just expanding the top half??

 

[la-shooter]

First PPC I ever owned had the exact problem. Gunsmith said he thinks the reamer drug a chip and it keeps the brass from flowing normal. This is what affects the neck tension. I shot the barrel for several matches and it shot like crazy but that issue drove me crazy. Sold the gun. Think this may be what happened with you? Brass is fine for the first several firings then the ring starts to get more noticeable. Probably wouldn’t affect brass as much with a thicker wall neck. Have a good one!

 

[D Coots]

This^^^^like I said in post #3.

My problem was with a .269nd and. 012 neck thickness. Tight spot in chamber neck.